Hydrochloric Acid → 4-Pyridin-3-yl-2-pyrimidin-2-yl-1,2-dihydro-3H-pyrazol-3-one

HRID 889302

Reaktionsgleichung

Reaktionsgleichung von HRID 889302
C(O[C:4](=[O:14])[C:5]([C:8]1[CH:9]=[N:10][CH:11]=[CH:12][CH:13]=1)=[CH:6]O)C.[NH:15]([C:17]1[N:22]=[CH:21][CH:20]=[CH:19][N:18]=1)[NH2:16].[H-].[Na+].Cl>C(O)C>[N:10]1[CH:11]=[CH:12][CH:13]=[C:8]([C:5]2[C:4](=[O:14])[N:15]([C:17]3[N:22]=[CH:21][CH:20]=[CH:19][N:18]=3)[NH:16][CH:6]=2)[CH:9]=1

Komponenten

6

Edukt 4

HCID 313Hydrochloric AcidHCID 24758Sodium hydrideHCID 3465582-HydrazinylpyrimidineHCID 687080883-Hydroxy-2-pyridin-3-yl-acrylic acid ethyl ester

Produkt 1

HCID 591869714-Pyridin-3-yl-2-pyrimidin-2-yl-1,2-dihydro-3H-pyrazol-3-one

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

193 mg (1 mmol) of the compound from Example 2A and 116 mg (1.05 mmol) 2-hydrazinopyrimidine are initially introduced into 2 ml anhydrous ethanol under argon and the mixture is stirred at RT for 20 h. 40 mg (1 mmol) sodium hydride suspension (60% strength in paraffin oil) are then added in portions, a significant clouding of the reaction solution developing. The mixture is subsequently stirred at RT for 10 min. 1 ml 1 M hydrochloric acid is then added to the dark reaction mixture, a precipitate separating out. The precipitate is filtered off with suction and the residue is washed with water (2×1 ml) and dried in vacuo. 173 mg (72% of th.) of the title compound are obtained.

Aufarbeitung

  1. stirringThe mixture is subsequently stirred at RT for 10 min
  2. customa precipitate separating out
  3. filtrationThe precipitate is filtered off with suction
  4. washthe residue is washed with water (2×1 ml)
  5. customdried in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-070ffdff072d47598df30111070eeaa4
Quelldatensatz
uspto-grants-2012_08
Patentnummer
US08252817B2

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